Embattled River Birch landfill owner Fred Heebe has filed a new lawsuit against a federal prosecutor, this one targeting First Assistant U.S. Attorney Jan Mann. The suit was filed in Civil District Court Friday. Heebe is claiming that Mann used an anonymous handle, "eweman," to comment on stories posted at NOLA.com.

Fred Heebe, left, and Sal PerriconeThe Times-Picayune

Heebe in March unmasked federal prosecutor Sal Perricone as the author of comments posted on NOLA.com by "Henry L. Mencken1951." Perricone resigned after admitting he was the author of the comments, many of which criticized targets of federal probes.

No comments left at NOLA.com by "eweman" could be immediately located.

The lawsuit, which can be read here, states that "eweman" commented regularly between November 2011 and March, but stopped when Perricone admitted his missteps. The suit also stated that 21 of the 35 comments found discuss the U.S. Attorney's Office or its targets. Some are reproduced in the suit.

One comment highlighted in the suit discusses the decision by Dominick Fazzio, the River Birch executive who is facing fraud charges in a case tangential to the landfill, to go to trial.

"The juries in federal court seem to uniformly find that the prosecutors are doing the right thing and proving their cases beyond doubt," it says in part. "Too bad for Fazzio if he is only taking this route because he is afraid of his boss. Does anyone see a pattern here?"

Fazzio's boss is Heebe.

Another email criticizes WWL-AM talk-radio host Garland Robinette, who admitted taking a $250,000 loan from Heebe not long after disparaging River Birch's competitors on air. Robinette has not been charged with a crime, but has been questioned by federal agents.

"His disgrace was selling his opinions to the highest bidder," it says in part. "How can any listener trust his statements on air after that? How do his bosses justify him not disclosing this before he got caught? If hypocrisy is one of the most damning traits, Mr. Robinemblind is the poster boy. He is a two bit journalist/artist/con man who needs to go ASAP."

The suit claims that "eweman" commits various typographical errors that are consistent with those committed in some of Mann's writings. Heebe used a similar -- though perhaps more sophisticated -- forensic analysis to make his case that Perricone was "Mencken."

In that case, a former FBI analyst noted that both Perricone and "Mencken" favored rare words such as "dubiety" and "redoubt."

The suit claims that both Mann and "eweman" use the term "fender lizard," to refer to "cop groupies."

Heebe is at the center of a sprawling probe examining the sharp-elbowed business tactics River Birch used to gain a near-monopoly on the landfill business in southeastern Louisiana. A recent NOLA.com | The Times-Picayune series explored that topic.

Mann did not immediately return a call seeking comment. A spokeswoman for U.S. Attorney Jim Letten, Mann's boss, said Letten has yet to see the lawsuit and would have no immediate comment.

Kyle Schonekas, a lawyer for Heebe, did not immediately return a phone call.